Usage of default-server

Help!
1

Hello!

This works:

server server1:3306 maxconn 65536 check inter 5000 rise 3 fall 3 weight 1 agent-send backend1\ server1\n agent-check agent-addr 127.0.0.1 agent-port 9200  agent-inter 15000

This does not:

default-server agent-check agent-addr 127.0.0.1 agent-port 9200 agent-inter 15000

server server1 server1:3306 maxconn 65536 check inter 5000 rise 3 fall 3 weight 1 agent-send server1\ server1\n

gerardo@lb1:~$ sudo haproxy -vv
HA-Proxy version 1.8.19-1 2019/02/12
Copyright 2000-2019 Willy Tarreau willy@haproxy.org

Build options :
TARGET = linux2628
CPU = generic
CC = gcc
CFLAGS = -O2 -g -O2 -fdebug-prefix-map=/build/haproxy-1.8.19=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fno-strict-aliasing -Wdeclaration-after-statement -fwrapv -Wno-format-truncation -Wno-null-dereference -Wno-unused-label
OPTIONS = USE_GETADDRINFO=1 USE_ZLIB=1 USE_REGPARM=1 USE_OPENSSL=1 USE_LUA=1 USE_SYSTEMD=1 USE_PCRE2=1 USE_PCRE2_JIT=1 USE_NS=1

Default settings :
maxconn = 2000, bufsize = 16384, maxrewrite = 1024, maxpollevents = 200

Built with OpenSSL version : OpenSSL 1.1.1a 20 Nov 2018
Running on OpenSSL version : OpenSSL 1.1.1c 28 May 2019
OpenSSL library supports TLS extensions : yes
OpenSSL library supports SNI : yes
OpenSSL library supports : TLSv1.0 TLSv1.1 TLSv1.2 TLSv1.3
Built with Lua version : Lua 5.3.3
Built with transparent proxy support using: IP_TRANSPARENT IPV6_TRANSPARENT IP_FREEBIND
Encrypted password support via crypt(3): yes
Built with multi-threading support.
Built with PCRE2 version : 10.32 2018-09-10
PCRE2 library supports JIT : yes
Built with zlib version : 1.2.11
Running on zlib version : 1.2.11
Compression algorithms supported : identity(“identity”), deflate(“deflate”), raw-deflate(“deflate”), gzip(“gzip”)
Built with network namespace support.

Available polling systems :
epoll : pref=300, test result OK
poll : pref=200, test result OK
select : pref=150, test result OK
Total: 3 (3 usable), will use epoll.

Available filters :
[SPOE] spoe
[COMP] compression
[TRACE] trace

Help is appreciated.
Thanks,
Gerardo

2

agent-send backend1\ server1\n

is not the same as:
agent-send server1\ server1\n

3

Indeed it isn’t, should read backend1\ server1\n in both cases. Sorry.

That is what the actual config says, and still, the default-server version does not work, no connection attempted to 9200 at all. (and if the pair (backend, server) does not exist, the agent would return an error).

4

Got it to work.

Had to specify agent-addr 127.0.0.1 in each server, default-server was not enough.

Could this be deliberate? My choice here is unusual, to run the check in the LB.

Thanks,
Gerardo